A star that is moving toward an observer has its visible light shifted toward which end of the spectrum? A. blue B. red C. yellow D. white

A force of attraction/repulsion due to the spin of electrons

Which releases more energy, 100 grams of 100c water cooling to 50c, or 100 grams of iron at 100c cooling to 50c

Most elements on the left side of the periodic table are

175.046 kilometers per hour is how many meters per hour? Your answer should be accurate to 1 meter per hour. Enter your answer without a comma.

Lindsey started biking to the park traveling 15 mph, after some time the bike got a flat so Lindsey walked the rest of the way, traveling 4 mph.

A 50 Newton box is moved a distance of 12 meters. How much work was done on the box?

An alloy is made of a material of specific gravity 7.87 and another material of specific gravity 4.50. The alloy of mass 750g has an apparent weight of 6.6N when totally immersed in a liquid of specific gravity 0.78.

A ball with a mass of 3 kg moving at 5 m/s collides with a 9 kg ball at rest. After the collision, the impacting (3 kg) ball bounces back at a speed of 2.5 m/s. How fast does the 9 kg ball move and in what direction

Consider the four salts represented on the solubility curves displayed as line graphs. In all four cases the salts are which part of an aqueous solution?

A hot-air balloon of diameter 12 m rises vertically at a constant speed of 11 m/s. A passenger accidentally drops his camera from the railing of the basket when it is 19 m above the ground.